CN108319427A - A kind of Raid10 implementation methods for supporting quickly to rebuild and device - Google Patents
A kind of Raid10 implementation methods for supporting quickly to rebuild and device Download PDFInfo
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- CN108319427A CN108319427A CN201711389020.2A CN201711389020A CN108319427A CN 108319427 A CN108319427 A CN 108319427A CN 201711389020 A CN201711389020 A CN 201711389020A CN 108319427 A CN108319427 A CN 108319427A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
- G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0683—Plurality of storage devices
- G06F3/0689—Disk arrays, e.g. RAID, JBOD
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Abstract
Supporting that the Raid10 implementation methods quickly rebuild and device, technical solution are the present invention provides a kind of：Raid10 is constructed using 2N disk, including：Each disk is divided into the first storage region and the second storage region including m data block, top n disk is as the data disk of storage source data, rear N number of disk as the mirrored disk for storing mirror image data；Establish the mirror in each data block and mirrored disk between each data block in data disk；When any disk failure, the corresponding mirror image data storage of the failed disk is belonged into second storage region of 1 disk of same type of other N to it, and executes the reconstruction of the failed disk using the mirror image data stored in the second storage region of 1 disks of other N.
Description
Technical field
The present invention relates to technical field of memory, more particularly to a kind of Raid10 implementation methods for supporting quickly to rebuild and dress
It sets.
Background technology
Raid10 is the assembly of a Raid1 and Raid0, band collection mirror image is realized using even-odd check, continuous
While data and the multiple disks of parallel read/write are divided in ground as unit of position or byte, make disk mirroring for each piece of disk
Carry out redundancy.Raid1 is the backup array of a redundancy, and Raid0 is then responsible for the read-write array of data.The advantages of Raid10 is
Possess the speed free from worldly cares of RAID 0 and the data high reliability of RAID 1 simultaneously.
It is the structural schematic diagram of prior art Raid10 referring to Fig. 1, Fig. 1, disk 1 and disk 2 form a Raid1, magnetic
Disk 3 and disk 4 form another Raid1 again；The two Raid1 constitute a new Raid0, to be integrally formed
Raid10.If the data write on disk 1 are 1,3,5,7, the data write in disk 2 are 1,3,5,7, if writing on magnetic
Data in disk 3 are 0,2,4,6, then the data write in disk 4 are then 0,2,4,6, therefore data group on this four disks
Synthesize Raid10.
When certain block disk in Raid10 breaks down, need to do RAID10 reconstructions, as disk size is increasing,
Reconstruction time is also increasingly longer, if in reconstruction process the disk mirrored disk failure, will appear and lose data cases.
Invention content
In view of this, the purpose of the present invention is to provide a kind of Raid10 implementation methods for supporting quickly to rebuild and device,
It can accelerate disk and rebuild speed, avoid the loss of data phenomenon caused by disk failure.
In order to achieve the above object, the present invention provides following technical solutions：
A kind of Raid10 implementation methods for supporting quickly to rebuild, including：
Raid10 is constructed using 2N disk, including：Each disk is divided into the first memory block including m data block
Domain and the second storage region, top n disk are used as storage mirror image data as data disk, the rear N number of disk of storage source data
Mirrored disk；The mirror image in data disk in each data block and mirrored disk between each data block is established to close
System；
When any data disk failure, the corresponding mirror image data in mirrored disk of the fault data disk is stored
To the second storage region of other data disks, and utilize the mirror image data stored in the second storage region of other data disks
Execute the reconstruction of the fault data disk；
When either image disk failure, the corresponding source data storage in data disk of the failure mirrored disk is arrived
Second storage region of other mirrored disks, and executed using the source data stored in the second storage region of other mirrored disks
The reconstruction of the failure mirrored disk.
A kind of Raid10 realization devices for supporting quickly to rebuild, including：
Structural unit is used to construct Raid10 using 2N disk, including：Each disk is divided into including m data
The first storage region and the second storage region of block, top n disk are made as data disk, the rear N number of disk of storage source data
To store the mirrored disk of mirror image data；Establish each data block and each data in mirrored disk in data disk
Mirror between block；
Trouble unit, for detection data disk and mirrored disk whether failure；
Reconstruction unit is used for when any data disk failure, and the fault data disk is corresponding in mirrored disk
Mirror image data storage to other data disks the second storage region, and using other data disks the second storage region in
The mirror image data of storage executes the reconstruction of the fault data disk；For when either image disk failure, by the failure mirror image
The corresponding source data in data disk of disk stores the second storage region to other mirrored disks, and utilizes other mirror images
The source data stored in second storage region of disk executes the reconstruction of the failure mirrored disk.
As can be seen from the above technical solution, in the present invention, using 2N disk construction Raid10, each disk is divided into the
One storage region and the second storage region, the first storage region includes m data block, and top n disk and rear N number of disk are distinguished
As data disk and mirrored disk, the mirror between data disk and mirrored disk is established；When there is any disk
When failure, the data in the failed disk are stored using the second storage region with its same type of other N-1 disk, and
The data stored using the second storage region of other N-1 disks execute the reconstruction of the failed disk.The present invention pass through by
In backup (mirror image) data storage to the second memory space for belonging to same type of disk with it of disk so that reconstruction process
In can with parallel migration data, can accelerate disk rebuild speed, simultaneously as two parts of backups are stored in Raid10 simultaneously
Data can cause the loss of data in failed disk reconstruction process existing to avoid the corresponding mirrored disk failure of failed disk
As.
Description of the drawings
Fig. 1 is the structural schematic diagram of prior art Raid10；
Fig. 2 is that the embodiment of the present invention supports the Raid10 implementation method flow charts quickly rebuild；
Fig. 3 is the structural schematic diagram that the embodiment of the present invention supports the Raid10 realization devices quickly rebuild.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and according to embodiment,
Technical scheme of the present invention is described in detail.
It is that the embodiment of the present invention supports the Raid10 implementation method flow charts quickly rebuild referring to Fig. 2, Fig. 2, such as Fig. 2 institutes
Show, this method mainly includes the following steps that：
Step 201 constructs Raid10 using 2N disk.
The concrete methods of realizing of this step is：
Each disk is divided into the first storage region (the first storage region includes m data block) and the second memory block
Domain；
2N disk be numbered from 0 to 2N-1, using top n disk as the data disk of storage source data
(being numbered from 0 to N-1), using rear N number of disk as the mirrored disk (number from N to 2N-1) of storage mirror image data；
Establish the mirror in each data block and mirrored disk between each data block in data disk.
In the present embodiment, establish in data disk in each data block and mirrored disk between each data block
The specific method of mirror be：
It establishes between the data block block ' in the data block block (a, b) in data disk and mirrored disk (a ', b ')
Mirror, a, b, a ', the relationship of b ' indicates with following three formula：
A '=N+ (a+b%N) %N；(formula one)
B '=b；(formula two)
A=a '-N-b ' %N；(formula three)
Wherein, a and a ' indicates that disk number, b and b ' are number of the data block in its affiliated disk.
The mirror (mapping relations) as shown in table one, table two can be obtained using above three formula：
Table one
Table two
In addition, it is assumed that the storage size of the first storage region is size1 in each disk, then the second memory space is big
It is small to be less than size2, wherein size2=size1/ (N-1).
Step 202 detects that disk failure, failed disk are that data disk thens follow the steps 202, and failed disk is mirror image
Disk thens follow the steps 203.
Step 203, when any data disk failure, by the corresponding mirror image in mirrored disk of fault data disk
Data store the second storage region to other data disks, and using storing in the second storage region of other data disks
Mirror image data executes the reconstruction of the fault data disk.
Step 204, when either image disk failure, by the corresponding source number in data disk of the failure mirrored disk
According to the second storage region of storage to other mirrored disks, and utilize the source stored in the second storage region of other mirrored disks
Data execute the reconstruction of the failure mirrored disk.
In the present embodiment,
By the corresponding mirror image data storage in mirrored disk of the fault data disk to the second of other data disks
The method of storage region is specially：The corresponding mirror image data in mirrored disk of fault data disk is equally divided into N-1
Part, and the second storage region of other N-1 data disks is copied to according to the first preset order portionwise；
The corresponding source data in data disk of the failure mirrored disk is stored to the second of other mirrored disks and is deposited
The method in storage area domain is specially：The corresponding source data in data disk of failure mirrored disk is equally divided into N-1 parts, and
Copy to the second storage region of other N-1 mirrored disks portionwise according to the second preset order.
In the present embodiment,
The weight of the fault data disk is executed using the mirror image data stored in the second storage region of other data disks
The method built is specially：The fault data disk is substituted with new data disk, and the second of other data disks will be stored in
Mirror image data in storage region is parallel to migrate to the new data disk；
The reconstruction of the failure mirrored disk is executed using the source data stored in the second storage region of other mirrored disks
Method be specially：The failure mirrored disk is substituted with new mirrored disk, and is deposited being stored in the second of other mirrored disks
Source data in storage area domain is parallel to migrate to the new mirrored disk.
The Raid10 implementation methods quickly rebuild to present invention support above are described in detail, the present invention also provides
A kind of Raid10 realization devices for supporting quickly to rebuild, are described in detail below in conjunction with Fig. 3.
It is the structural schematic diagram that the embodiment of the present invention supports the Raid10 realization devices quickly rebuild referring to Fig. 3, Fig. 3, such as
Shown in Fig. 3, which includes：
Structural unit 301 is used to construct Raid10 using 2N disk, including：Each disk is divided into including m number
According to the first storage region and the second storage region of block, data disk, rear N number of disk of the top n disk as storage source data
Mirrored disk as storage mirror image data；Establish each data block and each number in mirrored disk in data disk
According to the mirror between block；
Trouble unit 302, for detection data disk and mirrored disk whether failure；
Reconstruction unit 303 is used for when any data disk failure, and the fault data disk is corresponding in mirrored disk
In mirror image data storage to other data disks the second storage region, and using other data disks the second storage region
The mirror image data of middle storage executes the reconstruction of the fault data disk；For when either image disk failure, by the failure mirror
As the second storage region of the corresponding source data storage in data disk of disk to other mirrored disks, and utilize other mirrors
As disk the second storage region in the source data that stores execute the reconstruction of the failure mirrored disk.
In Fig. 3 shown devices,
The structural unit 301, for top n disk to be numbered from 0 to N-1, to rear N number of disk from N to 2N-1
It is numbered；
The structural unit 301, each data block and each number in mirrored disk in establishing data disk
When according to mirror between block, it is used for：Establish the data block block (a, b) in data disk and the data in mirrored disk
Mirror between block block ' (a ', b '), a, b, a ', the relationship of b ' indicates with following formula：
A '=N+ (a+b%N) %N；
B '=b；
A=a '-N-b ' %N；
Wherein, a and a ' indicates that disk number, b and b ' are number of the data block in its affiliated disk.
In Fig. 3 shown devices,
The memory space of second storage region of each disk is not less than size2, wherein size2=size1/ (N-1),
Size1 is the storage size of the first storage region.
In Fig. 3 shown devices,
The corresponding mirror image data storage in mirrored disk of the fault data disk is arrived it by the reconstruction unit 303
When second storage region of its data disk, it is used for：By the corresponding mirror image data in mirrored disk of fault data disk
N-1 parts are equally divided into, and copies to the second storage region of other N-1 data disks portionwise according to the first preset order；
The reconstruction unit 303 stores the corresponding source data in data disk of the failure mirrored disk to other
When the second storage region of mirrored disk, it is used for：The corresponding source data in data disk of failure mirrored disk is averaged
It is divided into N-1 parts, and copies to the second storage region of other N-1 mirrored disks portionwise according to the second preset order.
In Fig. 3 shown devices,
The reconstruction unit 303, being executed using the mirror image data stored in the second storage region of other data disks should
When the reconstruction of fault data disk, it is used for：The fault data disk is substituted with new data disk, and other data will be stored in
Mirror image data in second storage region of disk is parallel to migrate to the new data disk；
The reconstruction unit 303 executes the event using the source data stored in the second storage region of other mirrored disks
When hindering the reconstruction of mirrored disk, it is used for：The failure mirrored disk is substituted with new mirrored disk, and other mirror image magnetic will be stored in
Source data in second storage region of disk is parallel to migrate to the new mirrored disk.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (10)
1. a kind of Raid10 implementation methods for supporting quickly to rebuild, which is characterized in that this method includes：
Raid10 is constructed using 2N disk, including：By each disk be divided into the first storage region including m data block and
Second storage region, top n disk is as the storage data disk of source data, rear N number of disk as the mirror for storing mirror image data
As disk；Establish the mirror in each data block and mirrored disk between each data block in data disk；
When any data disk failure, the corresponding mirror image data storage in mirrored disk of the fault data disk is arrived it
Second storage region of its data disk, and executed using the mirror image data stored in the second storage region of other data disks
The reconstruction of the fault data disk；
When either image disk failure, the corresponding source data in data disk of the failure mirrored disk is stored to other
Second storage region of mirrored disk, and execute the event using the source data stored in the second storage region of other mirrored disks
Hinder the reconstruction of mirrored disk.
2. according to the method described in claim 1, it is characterized in that,
Top n disk is numbered from 0 to N-1, rear N number of disk is numbered from N to 2N-1；
Establish the side of the mirror in data disk in each data block and mirrored disk between each data block
Method is：It establishes between the data block block ' in the data block block (a, b) in data disk and mirrored disk (a ', b ')
Mirror, a, b, a ', the relationship of b ' indicates with following formula：
A '=N+ (a+b%N) %N；
B '=b；
A=a '-N-b ' %N；
Wherein, a and a ' indicates that disk number, b and b ' are number of the data block in its affiliated disk.
3. method according to claim 1, which is characterized in that
The memory space of second storage region of each disk is not less than size2, wherein size2=size1/ (N-1), size1
For the memory space of the first storage region.
4. according to the method described in claim 3, it is characterized in that,
By the second storage of the corresponding mirror image data storage in mirrored disk of the fault data disk to other data disks
The method in region is：The corresponding mirror image data in mirrored disk of fault data disk is equally divided into N-1 parts, and according to
First preset order copies to the second storage region of other N-1 data disks portionwise；
By the corresponding source data storage in data disk of the failure mirrored disk to the second memory block of other mirrored disks
The method in domain is：The corresponding source data in data disk of failure mirrored disk is equally divided into N-1 parts, and according to second
Preset order copies to the second storage region of other N-1 mirrored disks portionwise.
5. according to the method described in claim 4, it is characterized in that,
The reconstruction of the fault data disk is executed using the mirror image data stored in the second storage region of other data disks
Method is：The fault data disk, and the second storage region that other data disks will be stored in are substituted with new data disk
In mirror image data be parallel to migrate to the new data disk；
The side of the reconstruction of the failure mirrored disk is executed using the source data stored in the second storage region of other mirrored disks
Method is：The failure mirrored disk is substituted with new mirrored disk, and will be stored in the second storage region of other mirrored disks
Source data be parallel to migrate to the new mirrored disk.
6. a kind of Raid10 realization devices for supporting quickly to rebuild, which is characterized in that the device includes：
Structural unit is used to construct Raid10 using 2N disk, including：Each disk is divided into including m data block
First storage region and the second storage region, top n disk are used as and deposit as data disk, the rear N number of disk of storage source data
Put the mirrored disk of mirror image data；Establish in data disk in each data block and mirrored disk each data block it
Between mirror；
Trouble unit, for detection data disk and mirrored disk whether failure；
Reconstruction unit is used for when any data disk failure, by the corresponding mirror in mirrored disk of fault data disk
As the second storage region of data storage to other data disks, and using being stored in the second storage region of other data disks
Mirror image data execute the reconstruction of the fault data disk；For when either image disk failure, by the failure mirrored disk
The corresponding source data in data disk stores the second storage region to other mirrored disks, and utilizes other mirrored disks
The second storage region in the source data that stores execute the reconstruction of the failure mirrored disk.
7. device according to claim 6, which is characterized in that
The structural unit compiles rear N number of disk for top n disk to be numbered from 0 to N-1 from N to 2N-1
Number；
The structural unit, in establishing data disk in each data block and mirrored disk between each data block
Mirror when, be used for：Establish the data block block (a, b) in data disk and the data block block ' in mirrored disk
Mirror between (a ', b '), a, b, a ', the relationship of b ' indicates with following formula：
A '=N+ (a+b%N) %N；
B '=b；
A=a '-N-b ' %N；
Wherein, a and a ' indicates that disk number, b and b ' indicate number of the data block in its affiliated disk.
8. device according to claim 6, which is characterized in that
The memory space of second storage region of each disk is not less than size2, wherein size2=size1/ (N-1), size1
For the memory space of the first storage region.
9. device according to claim 8, which is characterized in that
The reconstruction unit, by the corresponding mirror image data storage in mirrored disk of the fault data disk to other data magnetic
When the second storage region of disk, it is used for：The corresponding mirror image data in mirrored disk of fault data disk is equally divided into
N-1 parts, and the second storage region of other N-1 data disks is copied to according to the first preset order portionwise；
The reconstruction unit, by the corresponding source data storage in data disk of the failure mirrored disk to other mirrored disks
The second storage region when, be used for：The corresponding source data in data disk of failure mirrored disk is equally divided into N-1
Part, and the second storage region of other N-1 mirrored disks is copied to according to the second preset order portionwise.
10. device according to claim 9, which is characterized in that
The reconstruction unit executes the fault data using the mirror image data stored in the second storage region of other data disks
When the reconstruction of disk, it is used for：The fault data disk is substituted with new data disk, and the of other data disks will be stored in
Mirror image data in two storage regions is parallel to migrate to the new data disk；
The reconstruction unit executes the failure mirror image magnetic using the source data stored in the second storage region of other mirrored disks
When the reconstruction of disk, it is used for：The failure mirrored disk is substituted with new mirrored disk, and the second of other mirrored disks will be stored in
Source data in storage region is parallel to migrate to the new mirrored disk.
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| CN110187833A (en) * | 2019-05-22 | 2019-08-30 | 西安微电子技术研究所 | A kind of redundancy approach of the storage array of chip-scale |
| CN115543216A (en) * | 2022-11-29 | 2022-12-30 | 苏州浪潮智能科技有限公司 | Disk array distribution architecture, block calculation method, system, device and medium |
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| CN108319427B (en) | 2021-02-09 |
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